Lay out what needs to be implemented for Mac

Source/Editor/Utilities/ScreenUtilities/ScreenUtilitiesMac.cpp

@@ -2,6 +2,39 @@
 #include <Cocoa/Cocoa.h>
 #include <AppKit/AppKit.h>
 
+Color32 ScreenUtilities::GetPixelAt(int32 x, int32 y)
+{
+    // Called from C# for live updates to the color.
 
+    return { 0, 0, 0, 255 };
+}
+
+Int2 ScreenUtilities::GetScreenCursorPosition()
+{
+    // Called from C# for live updates to the color.
+
+    return { 0, 0 };
+}
+
+class ScreenUtilitiesMac
+{
+public:
+    static void BlockAndReadMouse();
+};
+
+void ScreenUtilitiesMac::BlockAndReadMouse()
+{
+    // Maybe you don't need this if you go with NSColorSampler
+}
+
+Delegate<Color32> ScreenUtilities::PickColorDone;
+
+void ScreenUtilities::PickColor()
+{
+    // This is what C# calls to start the color picking sequence
+    // This should stop mouse clicks from working for one click, and that click is on the selected color
+    // There is a class called NSColorSample that might implement that for you, but maybe not.
+    // It also might just work to copy the Linux Impl since Mac uses X as well, right?
+}
 
 #endif